mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-20 10:30:03 +00:00
349baa6039
useAA significantly improves the handling of vector code that has TBAA information attached. It also helps other cases, as shown by the testsuite changes here. The only real downside I've seen is that it interferes with MergeConsecutiveStores. The problem is that that optimization works top down, starting at the first store in the chain, and looks for cases where the chain result is only used by a single related store. These related stores don't alias, so useAA will have rewritten all the later stores to use a different chain input (typically the same one as the first store). I think the advantages outweigh the disadvantages though, so for now I've just disabled alias analysis for the unaligned-01.ll test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193521 91177308-0d34-0410-b5e6-96231b3b80d8
57 lines
1.3 KiB
LLVM
57 lines
1.3 KiB
LLVM
; Test 128-bit addition in which the second operand is constant.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
|
|
|
|
; Check additions of 1. The XOR ensures that we don't instead load the
|
|
; constant into a register and use memory addition.
|
|
define void @f1(i128 *%aptr) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: algfi {{%r[0-5]}}, 1
|
|
; CHECK: alcg
|
|
; CHECK: br %r14
|
|
%a = load i128 *%aptr
|
|
%xor = xor i128 %a, 128
|
|
%add = add i128 %xor, 1
|
|
store i128 %add, i128 *%aptr
|
|
ret void
|
|
}
|
|
|
|
; Check the high end of the ALGFI range.
|
|
define void @f2(i128 *%aptr) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: algfi {{%r[0-5]}}, 4294967295
|
|
; CHECK: alcg
|
|
; CHECK: br %r14
|
|
%a = load i128 *%aptr
|
|
%xor = xor i128 %a, 128
|
|
%add = add i128 %xor, 4294967295
|
|
store i128 %add, i128 *%aptr
|
|
ret void
|
|
}
|
|
|
|
; Check the next value up, which must use register addition.
|
|
define void @f3(i128 *%aptr) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK: algr
|
|
; CHECK: alcg
|
|
; CHECK: br %r14
|
|
%a = load i128 *%aptr
|
|
%xor = xor i128 %a, 128
|
|
%add = add i128 %xor, 4294967296
|
|
store i128 %add, i128 *%aptr
|
|
ret void
|
|
}
|
|
|
|
; Check addition of -1, which must also use register addition.
|
|
define void @f4(i128 *%aptr) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK: algr
|
|
; CHECK: alcg
|
|
; CHECK: br %r14
|
|
%a = load i128 *%aptr
|
|
%xor = xor i128 %a, 128
|
|
%add = add i128 %xor, -1
|
|
store i128 %add, i128 *%aptr
|
|
ret void
|
|
}
|